Nut-lock



C. S. H. SNOW.

NUT LOCK.

APPLICATION FILED JUNE 14. 1920.

1,376,296. Patented Apr. 26, 1921.

fly]. [*ZyZ UNITED STATES PATENT- OFFICE.

CHARLES STEWART HASTINGS SNDW, HAMPSTEAD, LONDON, ENGLAND.

NUT-LOCK.

Application filed June 14,

T 0 all whom it may concern:

Be it known that I, CHARLES STEWART.

HASTINGS Snow, a subject of His Majesty the King of England, andresident of Hampstead, in the county of London, Kingdom of England, haveinventedcertain new and useful Improvements in Nut-Locks, of which thefollowing is a specification.

This invention relates to improvements in nut locks and it has for itsprimary object to provide a device of simple and effective constructionin which the parts are; not liable to become detached when loose.

According to this invention the improved nut lock comprises two parts amain split sleeve or bush which is internally screwed to engage the boltor stud and an outer clamping nut or ring cooperating with a tapering orconical surface on the main sleeve or bush.

In order that the invention may be clearly understood and more readilycarriedinto effect it is hereinafter described with reference to theaccompanying drawings, in

Fig. 2 is an outside elevation of said nut lock on a bolt or stud;

Figs. 3 and 4 are sectional side elevations of two modifiedconstructions hereinafter described.

As shown and referring generally to the drawings the main sleeve (1 isinternally screw-threaded to fit the bolt or stud a and is dividedlongitudinally on one side as by a saw cut I). At its lower or innerendit is formed with a hexagon or other shaped engagement surface 0 andabove this it is suitably reduced in diameter and formed with a taperingand screw threaded surface d. Rotatably arranged around the said splitsleeve a is a hexagonal or other suitably formed clamping ring 0 whichis internally screw threaded to engage the external threads on the splitsleeve or bush a. Thus the tightening up of the clamping ring e willcontract the split sleeve or bush a constituting the nut proper on toits bolt or stud, giving a uniform "grip over the whole length of thethread of the nut which therefore cannot spread at the mouth.

In order to prevent detachment of the Specification of Letters Patent.

Patented Apr. 26, 1921.

1920. Serial No. 888,885.

parts before use or when they are loose the outer edge f of the innermember a is slightly spun or burred over in an outward direction thuspreventing the complete disengagement of the clamping nut or ring 6 fromthe split sleeve or bush a forming the nut.

If desired the clamping or looking effect may be wholly produced by atapering screw threaded surface on the inside of the clamping nut orring 6 engaging a similar external surface d on .the plit nut a as inFig. 1 or these parts may be in parallel screw engagement with eachother as in Fig. 3 and have conical surfaces 9 formed there on toproduce the said locking effect. In

some cases this locking effect may be ob-,

tained by dispensing with the screwed engagement surfaces and by makingthe-tape]:

surfaces 9 of such pitch that the member'e can be tapped into positionand held in its adjusted position by friction, as will be readilyunderstood by reference to 4 of the drawings. p

. It will be seenthat the main split sleeve is the only member inengagement with' the 'nutor bolt and thattherefore it is imposprovidedin which both hexagon surfaces are of the same size and can therefore beoperated by means of a single spanner.

What I claim is A nut lock comprising a main split sleeve having theexternal surface tapering with that portion of such su'rface of greatestdiameter plain and that portion of such surface of least'diameterthreaded in combination with an outer clamping nut having an interiorbore corresponding to the exterior surface of the mam sleeve and havinga plain portion of the sleeve and a threaded portion to cooperate withthe threaded portion of the sleeve, both the threaded and plain portionsof the clamping nut exerting a clamping action on the main sleeve in themovement of the nut longitudinally of the sleeve.

In testimony whereof I have hereunto signed my name.

' CHARLES STEWART HASTINGS SHOW.

